This is a merge of percona patch mysqlbinlog_fix.patch.

Apparently, MySQL 5.0 does not flag BEGIN/SAVEPOINT/COMMIT/ROLLBACK statements
in its binlogs with LOG_EVENT_SUPPRESS_USE_F like 5.1+ does. This causes
unnecessary `use` statements around such statements when the binlog is dumped
by mysqlbinlog.

Fix by always suppressing the output of `use` for these statements.